Snap Inc. chief strategy officer Imran Khan, one of the select members of CEO Evan Spiegel’s braintrust, is leaving the company, according to a regulatory filing on Monday.

Khan will continue as CSO for an interim period before stepping down, according to a SEC filing. A date for Khan’s exit hasn’t been set.

Khan’s departure “is not related to any disagreement with us on any matter relating to our accounting, strategy, management, operations, policies, or practices (financial or otherwise),” the company said in its filing.

“After nearly four years at Snap, I have decided to step down,” Khan said in a staff email obtained by CNBC. “This has been a very difficult decision for me to make. There is never a perfect time to say goodbye, but I know that the time is now. We have a stellar leadership team in place to guide Snap through the next phase of growth and on to the next chapter.”

Khan has held the role since joining from Credit Suisse in 2014. He notified the Snapchat parent company of his plans to exit on Sept. 6, according to the filing.

“Imran has been a great partner building our business. We appreciate all of his hard work and wish him the best” Spiegel said in an accompanying statement.

Snap reported strong revenue growth last month, with a 44 percent year-over-year Q2 sales increase, hinting Snapchat has been able to attract more advertisers. But that positive momentum was offset by the app losing 3 million users. Snap shares were down about 2.5 percent on Monday morning to $9.75 per share — marking a healthy dip from its $17 IPO in early 2017.

The U.S. House Intelligence Committee on Thursday released more than 3,500 advertisements and posts spread by Russian trolls before and after the 2016 U.S. election. Below is a look at 10 of the most shocking examples that stood out from Congress's reveal.

House Intelligence Committee

Many posts pushed the narrative that Hillary Clinton would confiscate guns if she were elected President.

House Intelligence Committee

This graphic meme painted cops as KKK members attacking a young black child.

House Intelligence Committee

Only "sissies" and other undesirables wouldn't support Donald Trump, many of the memes said.

House Intelligence Committee

President Obama was a "pawn" and "traitor" in the hands of "Arabian Sheikhs," said one 2016 ad.

Russian trolls also used Instagram to spread sponsored political memes.

House Intelligence Committee

The "Blacktivist" page routinely shared memes on Colin Kaepernick and other football players kneeling during the national anthem.

House Intelligence Committee

"Heart of Texas" routinely posted on "Killary Rotten Clinton," and threatened to secede from the union if she won the election.

House Intelligence Committee

The "Being Patriotic" page labeled ex-cons as "Obama voters."

House Intelligence Committee

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Congress just released 3,500 posts touching on a myriad of topics

The U.S. House Intelligence Committee on Thursday released more than 3,500 advertisements and posts spread by Russian trolls before and after the 2016 U.S. election. Below is a look at 10 of the most shocking examples that stood out from Congress's reveal.